Leather-beveling machine.



W.B.ARNOLD &'L MARHN.

Q LEATHER BEVELING MACHINE.

APPLICATION FILED OCT-2|.I909.

1 1 92,8 1 O. Patented July 25, 1916.

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W.-B. ARNOLD & T. MARTIN.

LEATHER BEVELING MACHINE.

APPLICATION FILED OCT. 21. I909.

venioz 's: mB.Lz-nold. Thonwsllfaritn. 3 W 1 Q8 Patnted July 25, 1916.

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W. B. ARNOLD & T. MARTIN.

LEATHER BEVELING MACHINE. APPLICATION FILED OCT. 2|, 19b9- I HHHHHH mu lllllll Inventors Qi'noZd. Tl: omas Martin.

6 I I 921, 16 474. flaw witnesses nzwbfx 1%M WILLIAM B. ARNOLD,

OF NORTH ABINGTON, AND THOMAS MARTIN, OF DORGHESTEB,

MASSACHUSETTS; SAID MARTIN ASSIGNOR TO SAID ARNOLD.

LEATHER-BEVELING IlIACHIN'E.

nieaeio.

Specification of Letters Patent.

Patented ma 25, rain.

Application filed October 21, 1909. Serial No. 523,742.

To all whom 2'25 may concern:

Be it known that we, WILLIAM B. ARNOLD and THOD/IAS MARTIN, citizens of the United States, and residents, respectively, of North Plymouth, and' the county of Suffolk, bothv Abington, in the county or of Dorchester, in in the State of Massachusetts, have invented an Improvement in Leather-Beveling Machines, of which the following description, in connection with the accompanying. drawings, is a specification, like numerals on the drawings representing like parts;

This invention relates to leather or other beveling machines and is more particularly intended for beveling counters and boX toes:

for boots and shoes.

In order that the principle of the invention may be readily understood, we have dis closed a single embodiment thereof in the accompanying drawings, wherein- Figure 1 is a side elevation of a leather beveling mach ne embodying our invention; Fig. 2 is a front view thereof; Fig. 3 is a vertical sectional view of a clamp preferably used to hold the rear edge of the leather upon the support; Fig. -i is an enlarged view in front elevation of the head of the machine; Fig. 5 is an enlarged view taken from the side'of the head ofthe' machine; Fig. 6 is a vertical sectional view upon the line 6-6 of' Fig. 4; Figs. 7 and 8 are details in vertical section of stop collars used in conjunction with the presser foot and presser finger respectively; Fig. 9 is an enlarged plan view of the head of the machine; Fig. 10 is a detail in front elevation representing the manner of supporting the knife; Fig. 11 is a vertical. sectional. view taken through the feed rolls and the knife, and representing the relation of the presser foot and presser finger thereto; Figs. 12 and 13 are plan views .of av counter and box toe blank cut by the machine; and Fig. 14 is a sectional view upon the line l i-14 of Fig. 13.

The leather or other beveling machine em bodying our invention may be used to bevel or cut leather in any desired manner, but in the present embodiment thereof is intended more particularly to out side leather into counters or be): toes by first cutting the side leather into strins canal in width. to the the counter or box toe blanks, said strips having their lateral edges oppositely beveled from one face. Each strip so sevlen gth of 3 ered is itself out into blanks of the proper Width along parallel bevels so that each blank presents upon one face three beveled edges constituting respectively two end and onetop bevel and the opposite face presenting along the fourth edge a'bottom bevel.

One object of our invention is toprovide a mechanism for cutting the leather with a minimum of waste and insuch a manner as to render it possible to eliminate some of the operations through which the blanks have heretofore been passed after being died out. The blanks as cut by the mechanism herein described may after being died out be passed through a sand papering machine and then molded into-final for1n,it being unnecessary to subject the blanks to the action of a skiving machine.

Referring more particularly to the drawings, the bed of the machine is represented at 1, it being supported by suitable standards 2. Journaled in suitable uprights 3 is a short shaft 3 having thereon fast and loose pulleys 4 and 5 and a pinion 6 meshing with a gear wheel 7 fast upon a countershaft 8 mounted in a divided box 99, between the parts of'which is received a gear 10 fast thereon and meshing with. a gear 11 fast upon a lower shaft 12, said shaft 12 being journaled in standards 13 rising from and preferably integral with a swinging frame 1apivoted at 15 upon the frame and spring pressed toward the upper shaft 8 by coil s1 rings 16, the tension whereof may be adjusted inanv suitable manner. The teeth of the gears 10 and 11 are so cut as to permit'the gears to remain in mesh when the feeding rolls carried by the shafts S and 12 are sufficiently separated to permit the introduction of the leather.

Thcgears 10 and 11 are of equal diameter,

so that the shafts 8 and 12 are driven at the same speed. Keyed upon the outer end of roll 18 being preferably rougher than the upper roll 17, and the two rolls having clifferentiated roughening formations so that the roughened portions of the two rolls will not mesh with each other and corrugate the leather. In Fig. 4:, we have represented the upper roll 17 as provided with fine longitudinal. fluting while the lower roll 18 is provided with a double angle corrugation extending circumferentially about the same. lVhen the mechanism is not in operation the feed rolls l7 and 18 are maintained slightly out of contact with each other to prevent wear. For this purpose, we have in Fig. 6 represented a bracket wherein the upper shaft 8 is mounted, as provided with a vertical socket 19 receiving therein a vertically adjustable pin 20, with which contacts an elevated portion 21 of the swinging frame 14, the pin 20 being vertically adjusted to maintain the desired separation of the rolls 17 and 18 when the mechanism is not in operation.

Inasmuch as all the cuts made by the knife are made upon a bevel, the knife is inclined to the axes of the feed rolls. While the knife may be mounted in any suitable manner, we have, in Figs. 9, 10 and 11, represented an arm 22, one end whereof is socketed within a split clamp bearing 23 provided upon the framing of the machine, the arm 22 being if desired provided with a collar to fix its position within the clamp bearing. lVhile the arm. may be shaped to directly support the knife head, we have herein represented the outer end as reduced in diameter and having clamped thereon an angular bracket 24, the outer arm whereof is provided with a split socket 25, within which is received a knife holder or head 26 having a circular rear end and a forward plane face 27 longitudinally grooved for the reception of the knife 28 having opposite forward beveled edges, as represented at 29. The knife is preferably of a thickness slightly exceeding the depth of the groove in the plane face 27 so as to project slightly above the 'walls thereof and is held therein by means of a shoe 30 having a lower plane face overlying the walls of the groove and contacting directly with the upper face of the knife between the side walls of the groove, the shoe being clamped in position by a screw 31 tapped into the shoe and knife holder 26 and passing through the elongated slot 32 in the knife, thereby permitting longitudinal ad justment of the latter to compensate for wear. In order longitudinally to adjust the knife, we have herein provided a screw 38 tapped into the knife holder 26 axially thereof and having a forward end 34 bearing upon the rear end of the knife. By adjusting the screw 33, the knife can from time to time be moved forward to compensate for wear.

Viewing Fig. 11, it will be observed that the forward edge of the knife 28 is slightly to the rear of the center of the feed rolls 1? and 18, this being rendered necessary in this embodiment of the invention because of the fact that the knife 28 is inclined to the longitudinal axes of the feed rolls 17 and 18, as

shown in Fig. 4. In order to permit the inclined positioning of the knife while main taining the feed rolls 1? and 18 in feeding relation, we have, as represented in Fig. 1-, circumferentially cut away the lower feed roll 18 upon a bevel, as indicated at 35 in Fig. f, one edge of the knife resting therein, as represented in said figure, and the other extending preferably slightly into a groove in the upper feed roll 17, to be hereinafter described. By means of the clamped bearing 23 and the rotative adjustment of the knife holder 26 within the bracket 24, the knife 28 may be set at any desired inclination. Inasmuch as the pieces of leather vary in thickness and it is desired for purposes of economy always to cut the leather on the longest possible bevel, it becomes necessary from time to time to adjust the inclination of the knife with varying thicknesses of leather.

We have stated that by our mechanism the leather is out along beveled lines first into strips and then along beveled lines into blanks. it will be evident that the strip beveled along opposite lateral edges is fed laterally between the feed rolls 17 and 18, so as to cut off transversely blanks, such represented in Figs. 12 and 13. In so feeding the strip a lateral beveled edge thereof is first presented to the feed rolls and to the knife. This beveled edge so first presented is exceedingly thin and uneven, tending to curl up or down. After a great deal of experimenting, we have found that it is essential to provide means to present this beveled leading edge to the feed rolls and to the knife in such manner as to prevent this thin edge curling up or down or otherwise becoming deformed. To that end, in the pres ent embodiment of the invention, we have provided two pressers, one positioned above the leather and herein termed the presser foot and the other positioned below the leather and herein termed the presser finger. Preferably the upper presser or presser foot is fixed in position, although adjustable, as hereinafter described, and presents a plane surface against which the leather is fed. The under presser or Dresser finger is yielding and is spring pressed toward the upper presser or presser foot so as to press the leather against it and straighten it out as it is fed between the rolls. in order that the thin beveled edge may properly engage the knife. Were not mechanism effecting the function herein described provided, the corner of the blank at the leading edge would be cut or torn away and the blank rendered useless or be so impaired as to negative the saving otherwise made by cutting the leather along beveled lines as herein described. The presser foot and presser finger not only serve to position the leading beveled edge of the leather as it is presented to the feed rolls and to the knife, but also to position the opposite beveled edge of the leather strip as it passes between the rolls to the knife.

While the presser mechanism herein described may be of any suitable construction, we have herein circumferentially grooved the feed rolls 17 and 18-as represented at 36 and 37 in Fig. 11 for the reception of the upper presser or presser foot 38 and the lower presser or presser finger 39. It is important that the presser foot 38 be set in exact position with respect to the feed rolls and to the knife and that it be capable of slight adjustment as it is set and also that having been once set it may be taken off for any required purpose and thereafter readily replaced without necessitating readjustment. To this end, we have provided a rocker arm 40, shown most clearly in Figs. 4, 5 and 6, sccketed at one end thereof within a clamp bearing 41 provided upon the machine framing. The said rocker arm extends in substantial parallelism with the shafts 8 and 12 and the outer end thereof overhangs the feed rolls 17, 18. The said outer end of the rocker arm 40 is bored as represented at 42 for the reception of the presser foot 38 which is of spindle or rod like formation and is held within the bored portion of the rocker shaft by a set screw 43. The lower end 44 of the. presser foot is preferably curved in conformity with the feed roll 17 and is received within the groove 36 therein with the outer curved face thereof substantially flush with the surface of the feed roll 17, as indicated in Fig. 11. It will be observed, viewing said figure, that the tip end of the presser foot extends beyond the axial centers of the feed rolis, so as almost to meet the knife, but just clearing the same. Moreover the extreme tip end of the presser foot is fiat upon its outer face as represented at 45, so that the leather may be held against the knife. It will be evident that the presser foot 38 must be carefully adjusted to position, this requiring a vertical adjustment of the presser foot within the rocker shaft and a circumferential adjustment of the rocker shaft within the clamp bearing 41. As it becomes necessary from time to time to remove the presser foot, we have provided means whereby the presser foot may be readily removed and yet returned to position without necessitating readjustment of the parts. To that end, in Figs. 4 and 7, we have represented the rocker shaft 4.0 as provided with a stop collar 46 having an angular arm 47 extending therefrom and adapted to engage beneath the arm 48, whereon the clamp bearing 41 is supported or whereon it is formed. The stop collar is further provided with a set screw 49 passing therethrough and into engagement with the rocker shaft 40. Then the presser foot 38 has been once adjusted into position the stop collar 46 is rotated until the arm 47 contacts with the bracket 48 as represented in Fig. 7, whereupon the set screw 49 is tightened. When it is de sired toremove the presser foot from the machine, it is merely necessary to loosen the clamp bearing 41 and rotate the rocker shaft 40 sufiiciently to permit the presser foot and the rocker shaft to be drawn from the clamp bearing longitudinally of the feed rolls. the parts being returned to position with the arm 47 of the stop collar 46 contacting with the bracket 48.

The lower presser or presser finger engaging the lower face of the leather and pressing it against the flattened tip of the presser foot 38 is herein represented as pivoted at 50 upon an arm 51. Said arm 51 is screwed and confined by a nut 52 upon a rocker shaft 53 positioned beneath and in substantial parallelism with the feed roll 18 and having its inner end socketed within a divided bearing 54 rising from a bracket 55, bolted to the bed of the machine and provided with a shoulder 56 with which contactsa pin 57 carried by the stop collar 58 similar it may be to the stop collar-46 and adapted to be secured in adjusted position upon the rocker shaft 53 by set screw 59, so that the lower presser or presser finger 39 may be after removal from the machine reset without readjustment. The lower end of the presser finger 39 is connected by spring 60 to the arm 51 whereby the upper or guiding face of the presser finger 39 is held against the under face of the leather and presses the same firmly against the tip end of the presser foot 38. The spring 60 permits the said presser finger to yield or separate from the presser foot when the edge of the'leather is introduced therebetween, said pressers being in contact with each other when stock 'is not between them. The clrcumferential grooves 36 and 37 in the feed rolls 17 and 18 are preferably of greater depth than the presser foot and presser finger 38 and 39 respectively, to provide clearance for chips.

If desired, the collar referred to as posi tioned up on the rock shaft 53, may be provided with a projection similar to that shown in Figs. 7 and 8, to determine the position of resetting thereof in the event of removal and replacement. We preferably provide astationary feed table or support herein represented at 61 in Fig. 9, and mount thereon a gage 62 adapted to be adjusted to and from the edge 63 of the table in any suitable manner. In order to smooth out the leather as it is fed along the table 61, we have herein provided a spindle 64 mounted in and extending from one face of the gage 62 and have loosely mounted thereon a series of collars 65, one or more of which may contact with any protruding portion of the leather and press or iron it down into position, the collars that contact with the leather rotating during such contact so as to reduce friction between them and the leather.

Inasmuch as the side leather from which the strips are to be cut is frequently of such size as to render it inconvenient to support and handle merely upon the stationary table 61, we have herein provided a movable table or support 66, as shown most clearly in Figs. 1 and 2 to support the leather in suitable manner to permit it to be moved toward the feed rolls. Nhile such table may be supported in any suitable manner, we have for this purpose provided the bed 1 with an angular bracket 67 having a flanged upper end 68 upon which the lower face of the bed 66 is received for sliding movement. lhe said lower face of the bed 66 is provided with guide rolls 69, 70 between which the flanged end 68 of the bracket is received and guided, the roll 69 preferably having a flange 71 positioned beneath the lower surface of the flanged end 68, thereby insuring the proper movement of the feed table or bed 66. l/Ve may provide any suitable means to brace or additionally support the said feed table 66. Herein we have represented an inwardly inclined, substantially V shaped brace or arm 7 2 extending downwardly from the under face thereof and having at its lower end a roll 73 received upon a bracket or guide-way 7a and serving in conjunction with the rolls 69 and 70 to guide the bed or table in its movement toward and from the feed rolls. If desired, a rectangular or other shaped brace may be provided, having a plurality of rolls received upon the guideway 74:. Preferably, we have provided the movable bed or table 66 with means to hold or clamp the rear edge of the leather. /Vhile any suitable device may be used for this purpose we have in Figs. 1 and 2 represented an arm 75 pivoted at 7 6 upon the bed and having its forward end 77 held against the leather 78 by a spring 79 encircling a pin 80, the tension of said spring being adjustable by the nut 81 upon the pin. The lower end of the pin is pivoted to a cam arm 82 itself pivoted at 83 eccentrically to the point of pivotal. connection of the pin 86 to the cam arm, in such manner as to act as a toggle, whereby when the cam arm 82 is in the position shown the pin is drawn axially downward and through the agency of the spring 79 holds the arm 7 5 against the upper surface of the leather, thereby clamping it in position upon the movable table. After the leather has been positioned upon the movable table the clamp is set in the position indicated and thereupon the table is moved toward the left viewing Fig. 1. Substantially upon the termination of the feeding movement of the table or bed 66 the cam arm 82 encounters a projection 84 upon the frame and is rocked outwardly and upwardly, thereby releasing the clamp arm 77 and permitting the spring 85 to elevate the same, thus releasing the leather.

ln-Fig. 12, we have represented the coun ter blank 86, and in Fig. 13 a box toe blank 87 formed by cutting transversely on a bevel leather strips of suitable width and previously beveled by cutting the side leather into strips along longitudinal beveled lines. The upper face of each of said blanks is pro vided with three beveled edges, namely the end bevels 88, 89 and the top bevel 90. The lower faces of said blanks are provided along the fourth edge with a bottom bevel indicated at 91 in Fig. 14. The blanks thus beveled are cut or died out as along the dotted line 92 indicated in Figs. 12 and 13, said blanks being thereafter molded into the desired shape.

From the foregoing description of the invention, it will be apparent that the leather is reduced first into strips and then into blanks which may be died or cut to shape with an absolutely minimum loss of material. When each strip is fed transversely to the beveling knife, then the previously beveled leading edge or corner thereof is ab solutely positioned with respect to the beveling knife by the pressers, thereby preventing tearing of the stock and insuring the severance of the strip transversely along the desired. lines.

So far as we are aware, we are the first to provide mechanism to feed a leather strip beveled upon opposite edges or upon its leading edge to the action of a beveling knife or severing mechanism, thereby transversely to sever said strip along beveled lines and therefore claim such subject matter broadly.

Having thus described one illustrative embodiment of the invention, we desire to be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Claims:

1. Leather beveling mechanism including in combination a pair of feed rolls having work-contacting peripheries, a knife positioned at one side of a plane containing the axes of said rolls with its forward edge in a plane transverse to said plane and oblique to said axes, said edge being located between and throughout its major portion in close proximity to the work-contacting periphcries of said rolls, and means positioned at the other side of said plane and arranged to engage both faces of a leather strip between said rolls in such manner as to present said strip to the action of said knife.

2. Leather beveling mechanism including feed rolls, a beveling knife between the rolls at one side of a plane containing their axes,

and pressers between the rolls and at the with each other.

3. Leather beveling mechanism comprising in combination a beveling knife, feed rolls, a presser between said rolls, an angularly adjustable support for said presser, and means permitting adjustment of said presser transversely of said support.

-l. Leather beveling mechanism comprising feed rolls, a. beveling knife inclined to the axes of said rolls, a yielding pivoted presser arranged to engage one face of a leather strip as presented by said rolls to said knife to guide the leading edge of the leather strip to said rolls and a co-acting presser to engage the opposite face of thestrip.

5. Leather beveling mechanism comprising in combination a beveling knife, feed rolls, an upper normally unyielding presser and a lower yielding presser to engage opposite faces of a leather strip and position the leading edge thereof as fed by said rolls to said knife. 4

6. Leather beveling mechanism including in combination a beveling knife, feed rolls, one of said rolls being peripherally grooved beyond the major part of the cutting edge of said knife and closely adjacent a lateral edge thereof and a presser positioned in said groove and having a leather-strip-contact'ing face substantially in the plane of the edge of said knife to present the leading edge of the strip thereto.

7 Leather beveling mechanism including in combination a beveling knife, a pair of feed rolls having registering peripheral grooves beyond the major part of the cutting edge of said knife and closely adjacent a lateral edge thereof and opposed pressers positioned in said grooves and arranged to engage the leather strip as its leading edge is presented to said knife.

8. Leather beveling mechanism including in combination, a pair of feed rolls, one of which is provided with a peripheral groove, a beveling knife having the major portion of its cutting edge located between the, workcontacting peripheries of said feed rolls and a presser located withinsaid groove and spaced from the base thereof to afford clearleading edge extending to that side of the axes of said feed rolls at which said knife is located.

10. A leather beveling mechanism including in combination a pair of feed rolls one of which is peripherally grooved, a leather beveling knife having its leading edge inclined and having a large portion thereof in said groove, and upper and lower pressers adapted to enter said groove.

11. Leather beveling mechanism including in combination a pair of feed rolls, one of said rolls having two peripheral grooves and the other roll having a peripheral groove registering with a groove of the first men-] tioned roll, a beveling knife inclined to the axes of said rolls and having a lateral edge located in the non-registering groove, and upper and lower pressers positioned Wltllln. said registering grooves.

13. Leather beveling mechanism including in combination, a beveling knife, a pair of feed rolls therefor, one of said rolls being longitudinally fluted and the other being circumferentially figured, one of said'rolls .be-

ing grooved, and a pair of pressers adapted to enter said groove.

14:. Leather beveling mechanlsm lncluding 'in combination a beveling knife, a ]of feed rolls therefor, and a presser relatively narrow with respect to the feedingporti-on of said rolls and positioned between said.

rolls to engage a leadingcorner only of the leather strip between the rolls as presented to the knife.

15. Leather beveling mechanism including i in combination a beveling knife, feeding rolls therefor, and means between said rolls to en a 'e a leadin corner onl of the-' b C D leather strip as the leading edge thereof is presented to the knife.

16. Leather beveling mechanism including in. combination a beveling knife, a pair of,

feed rolls, an angularly adjustable presser device, means to support said presser device in angularly adjusted position, and circumferentially adjustable means carried by said presser device constructed and arrangedv to serve as a guide for resetting the presser device in av previously adjusted position after -it has been displaced therefrom.

17 Leather beveling mechanism including in combination a beveling knife, a pair of feed rolls, a presser device, a support therefor, said presser device being adjustable with relation to and removable from said support,

setting the presser device in a previously adjusted position after it has been displaced therefrom.

18. Leather beveling mechanism including in combination a pair of feed rolls, a beveling knife at one side of a plane containing the axes of said rolls, and a pair-of normally self contacting relatively separable pressers supported upon the other side of said plane and extending between said rolls into close proximity to the leading edge of said knife.

19. Leather beveling mechanism including in combination a pair of feed rolls, a beveling knife at the rear thereof but having its edge extending between the rolls, and having parallel flat faces, and a pair of pressers in front of said rolls but extending between them, said pressers having faces adapted to engage each other substantially in the plane cutting the edge of said knife, and extending substantially parallel to the flat faces of said blade.

20. Leather beveling mechanism including in combination feed rolls one of which is peripherally grooved, a beveling knife at the rear thereof but having its edge extending between the rolls and into said groove, and having parallel flat faces, and a pair of pressers in front of said rolls but adapted to extend into said groove and having faces constructed to engage each other substantially in the plane cutting the edge of said blade and extending through said blade sub stantially parallel to the fiat faces thereof.

, 21,. Leather beveling mechanism comprising in combination a beveling knife, a pair of normally separated feed rolls between which the previously beveled leading edge of a leather strip is adapted to be inserted and a pair of normally self contacting relatively separable pressers to engage and position said leading, beveled edge when inserted be tween said feed rolls.

22. Leather beveling mechanism comprising in combination a beveling knife, a pair of normally separated, relatively yielding feed rolls between which the previously beveled leading edge of a leather strip is adapted to be inserted, and a pair of normally contacting pressers to engage and position said leading beveled edge when inserted between said feed rolls, one of said pressers being normally unyielding but adjustable, and the other being yielding.

23. Leather beveling mechanism including in combination feed rolls one of which is peripherally grooved, a beveling knife at the tially in the plane cutting the edge of said blade and extending through said blade to the flat faces thereof, one of said pressers being yielding and the other being adjustable.

24. Leather beveling mechanism comprising a beveling knife, cylindrical feed rolls to feed broad-side on the thin edge of a previously beveled strip, and a spring actuated presser to engage the said thin edge and position it substantially in a plane parallel to the axes of said feed rolls and transverse to a plane containing said axes and in such position to direct it to the edge of said beveling knife.

25. Leather beveling mechanism comprising feed rolls, a beveling knife at one side of the axes thereof and pressers at the other side of the axes of said r'olls closely adjacent merely one lateral edge of said knife and arranged to engage opposite faces of a leather strip to position it with relation to the edge of said knife.

26. Leather beveling mechanism including in combination a pair of grooved feed rolls,

one of which is peripherally grooved on a bevel, a leather beveling knife inclined to the axes of said rolls and having its leading inclined edge in said beveled groove and an upper-and a lower presser located in the other groove.

27. In a leather beveling machine, a leather beveling knife, means to deliver a leather strip to said knife, a work support ing table movable to and fro and a clamp carried by said table and comprising an arm pivoted thereto, a spring to press said arm against the work upon the table,.and lever 82 operatively connected to said arm.

28. A leather beveling mechanism including in combination a leather beveling knife, feed rolls to deliver a leather strip to said knife, awork supporting table movable to and fro, and a work clamp carried by said table and comprising an arm pivoted upon the table and spring pressed thereagainst, a pin arranged to control said spring pressure and a cam arm connected to said pin.

29. Leather beveling mechanism including in combination, a pair of feed rolls differentially roughened, and a beveling knife inclined. to the axes of said rolls, one of said rolls being circumferentially grooved for the receipt of the knife, and a presser in said groove and coacting with said knife.

In testimony whereof, we have signed our names to this specification, in the presence of two subscribing witnesses.

WILLIAM B. ARNOLD. THOMAS MARTIN. Witnesses:

IRVING U. TowNsnNn, ARTHUR E. CARSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

